Internal combustion engine



June 2,1931. H, BRACKMAN 1,807,725

INTERNAL comsusnou ENGINE Filed Nov. 16, 1928 4 Sheets-Sheet 1 b QM 4052a.

Atto r21 ay June 2, 1931. H H. BRAcKMAN 1,807,725

INTERNAL COMBUS TI ON ENGINE Filed Nov. 16, 1928 4 Sheets-Sheet 2 3 I/ v 7 7 5T g 54272911 6 FramZMQh I Attorney June 2, 1931. H. H. BRACKMAN INTERNAL COMBUSTION ENGINE 4 Sheets-Sheet 5 Filed Nov. 16, 1928 BUD, 5

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Attornqy June 2, 1931. H. .H. BRACKMAN 1,807,725

INTERNAL COMBUSTION ENGINE Filed Nov. 16, 1928 4 Sheets-Sheet 4 Inventor fiergel-f 6 Each! yflmaaizm Patented June 2, 1931 HERBERT H. BRACKMAN, F COLFAX, ILLINOIS INTERNAL COMBUSTION ENGINE Application filed November 16; 1928. Serial No. 319,908.

The present invention relates to an internal combustion engine and has for its prime object to provide means for eliminating piston slap and to minimize the wear on the piston.

Another important object of the invention resides in the provision of cross heads operatively connected with the pistons and with the crank shaft and efficient means for properly lubricating the cylinder wall and the cross heads.

Another very important object of the invention resides in the provision of an internal combustion engine of this nature which is strong and durable, thoroughly efficient and reliable in operation, and otherwise well adapted for the purpose for which it is designed.

With the above and numerous other objects in view as will appear as the description proceeds, the invention resides in certain novel features of construction, and in the construction and arrangement of parts as will be hereinafter more fully described and claimed.

In the drawings:

Figure 1 is a vertical lon itudinal section through the engine embo ying the features of my invention,

Figure 2 is a transverse vertical section therethrough taken substantially on the line 22 of Figure 1,

Figure 3 is a vertical longitudinal section through the engine taken substantially on the line 33 of Figure 2,

Figure 4 is an enlarged detail section taken substantially on the line 44 of Figure 1 Figure 5 is an enlarged detail section taken substantially on the line 55 of Figure 2, and

Figure 6 shows in detail the means for adjusting the valves.

Referring to the drawings in detail it will be seen that the numeral 5 denotes a cylinder block having a char bores 6 therein.

Ahead 7 is mounted on the cylinder block and has. firing chambers 8 formed therein and openings 9 therein to receive spark plugs. Intake and exhaust passages 1 0 are provided in the block 5. leading to the chainbers 8 and valves 11 are associated with these ports and have stems 12 slidable through bearings 14 and 15. These stems 12 are connected adjustably as at 16 with rods 17- that are slidable in a bearing shelf 19 formed in casing 20 bolted or otherwise secured to the bottom of the block 5 as is indicated at 21. y

A crank case 23 is secured to the casing 20 in any suitable or preferred manner. A cam shaft 24 is journaled in the casing 20 and has cams 25 to engage feet 26 on the rods 17 for operating the valves 11. Springs 28 are disposed about the rods and. impinge against stop members 29 on the rods to hold the rods down in engagement with the earns 25 and cam shaft 24 to prevent slipping.

Valve springs 30 are provided about the valve stem to normally hold the valves closed in the usual well known manner.

plurality of cylin- Rigid. rods 31 extend from pistons 32. 75:

These pistons 32 are slidable in the cylinder bores. and have their upper ends cupped or dished out, as indicated at 34. Cross heads 35 are rigidly engaged with the bars 31 and; have notches 36 which engage guide rods 37 mounted in the casing 20 by'means of brackets 38, 39, and 40 leading inwardly from the sides of the casing and brackets 41 at the top of the casing.

Vrist pins 42 in these cross heads operatively connect connecting rods 43 therewith. The connecting rods are operatively connected with the crank shaft 44 j ournaled in the crank casing 23. This crank shaft 44. is provided with dippers 45 todip oil out of sumps 46 formed in a pan or basin 48 mounted in the crank case 23.

A pump 49 is mounted by means of a bracket 50 in the lowerportion of the easing 20. A suction pipe 51 leads downwardly from the pump 49 to a strainer 52 in a sump 53 at the bottom of the crank case 23.

A pipe 54 leads from the pump upwardly to branches 56 which lead to other branches 57 into the various cylinder bores above the cross head and below the piston so as to lubricate the cylinder bore walls, the cross heads, the pistons.

This pump has its spring actuated plunger 58 engageable with a cam 59 on the cam shaft 24. The cam shaft 24 has a gear 60 thereon in a supplemental casing 61 on the casing 21 and this gear 60 meshes with a gear 62 on one end of the crank shaft 44 as is clearly illustrated in Figure 1.

From the above detailed description it will be seen that the cross head structure prevents piston slap and unnecessary wear and strain on the piston.

It will further be seen that the cross heads are thoroughly lubricated and will slide with a minimum of friction on the guide rods. It will furthermore be seen that the valve structures are such as to require and afford proper adjustment to obtain maximum power.

It will also be seen that the cupped upper end of the piston will prevent leakage and afford excellent compression.

It is thought that the construction, opera tion, utility and advantages of this advantage will now be quite apparent to those skilled in this art without a more detailed description thereof.

The present embodiment of the invention has been disclosed in detail merely for the purposes of exemplification since in actual practice it attains the features of advantage enumerated as desirable in the statement of the invention and the above description.

It will be apparent that changes in the details of construction, and in the combination and arrangement of parts may be resorted to without departing from the spirit or scope of the invention as hereinafter claimed or sacrificing any of its advantages.

Having thus descrlbed my invention, what I claim as new is:

An internal combustion engine of the class described comprising a cylinder block having a plurality of vertical bores therein, a plurality of vertically reciprocating pistons mounted in the bores and having depending bars rigidly coupled thereto, a crank case having a horizontal crank shaft journalled therein, a closed vertically disposed casing between the crank case and the cylinder head, said casing formed with vertical chambers in registration with the cylinder bores at their upper ends and the crank case on their lower ends, lateral brackets on the opposed side walls of the casing within said chambers, vertically disposed guide rods supported on the brackets in spaced relation to the walls of the chambers, cross heads formed on the lower ends of said depending bars provided with vertical grooves slidable on said guide rods, and connecting rods journalled at their opposite ends to the crank shaft and cross head respectively.

In testimony whereof I aflix my signature.

HERBERT H. BRACKMAN. 

